Yamaha-DVDC900-dvd-sm 维修电路原理图.pdf

DVD-C900DVD-C900100653SERVICE MANUALDVD PLAYERThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, arealready known and understood by the users, and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result inpersonal injury, destruction of expensive components, and failure of the product to perform as specified.For these reasons, we advise all YAMAHA product owners that any service required should be performedby an authorized YAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization,certification or recognition of any applicable technical capabilities, or establish a principle-agentrelationship of any form.The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering,and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore,inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear toexist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to thisbuss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power tothe unit.IMPORTANT NOTICEDVD-C900SERVICE MANUALDISC MODEANGLERETURNMULTI SPEEDTITLE/INDEXAUDIOSELECTSUBTITLEOFF/ONDVD1TITLEMENUSET UPON SCREENSTOPSTILL/PAUSE321547PLAY6+10098TIMEOPEN/CLOSEDISC SKIPCANCELRANDOMPROGS/F REPEAT A-BSKIP/SEARCHRadioFans.CN 收音机爱 好者资料库DVD-C900DVD-C9001. Critical Components Information.Components having special characteristics are marked andmust be replaced with parts having specifications equal tothose originally installed.2. Leakage Current Measurement (For 120V Models Only).When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohm shuntedby 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in bothpolarities.EQUIPMENTUNDER TESTWALLOUTLETINSULATINGTABLEAC LEAKAGETESTER OREQUIVALENTCAUTION: USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSESPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.THE COMPACT DISC PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLYQUALIFIED SERVICE PERSONNEL.PROTECTION OF EYES FROM LASER BEAM DURING SERVICINGI TO SERVICE PERSONNEL1This set employs a laser. Therefore, be sure to carefullyfollow the instructions below when servicing .1. PickupGWave length: 655 nmGLaser power: CLASS II2. When checking the laser diode emission, keep youreyes more than 30 cm away from the objective lens.I CONTENTSTO SERVICE PERSONNEL .1PREVENTION OF ELECTRO STATIC DISCHRGE (ESD) TOELECTRO STATICALLY SENSITIVE (ES) DEVICES.2SPECIFICATIONS .3REAR PANELS .4PRECAUTION LASER DIODE .5HANDLING PRECAUTIONS FOR TRAVERS DECK .5INTERNAL VIEW .6DISASSEMBLY PROCEDURES .78REPLACING THE MAIN PARTS OF THE TRAVERSE UNIT .910GREASE APPLICATION DIAGRAM.10MAIN P.C.B. OPERATION CHECK .11ADJUSTMENT.1213TEST MODE .1526TROUBLESHOOTIG .2730IC DATA .3146IC BLOCKS .4752PIN CONNECTION DIAGRAM .52DISPLAY DATA .53BLOCK DIAGRAM .5455PRINTED CIRCUIT BOARD .5665SCHEMATIC DIAGRAM .6668PARTS LIST .6984SWITCHING POWER SUPPLY .8587REMOTE CONTROL TRANSMITTER.88OPERATING INSTRUCTION .8996RadioFans.CN 收音机爱 好者资料库DVD-C900DVD-C900WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronicand/or plastic (where applicable) components may also contain traces of chemicals found by theCalifornia Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defectsor other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTHFOR ANY REASON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhalesolder fumes or expose eyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, washyour hands before handling food.2IPREVENTION OF ELECTRO STATIC DISCHARGE (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) DEVICESDVD-C900DVD-C900U . U.S.A. modelR . General modelT . China modelManufactured under license from Dolby Laboratories Licens-ing Corporation. Dolby and the double-D symbol V aretrademarks of Dolby Laboratories Licensing Corporation.I SPECIFICATIONS3I AUDIO SECTIONFrequency ResponseDVD (48kHz Sampling)2 Hz to 22 KHzDVD (96kHz Sampling)2 Hz to 44 KHzCD, Video CD2 Hz to 20 KHzHarmonic Distortion+Noise (1kHz)0.002% or lessS/N Ratio115 dB or more (Weighted)Dynamic RangeDVD (48kHz, 24 bit)104 dB or moreCD, Video CD100 dB or moreOutput Voltage (1 kHz, 0 dB)2.0 0.3VI VIDEO SECTIONVIDEO output1 Vp-p (75 ohms)S VIDEO outputY output1 Vp-p (75 ohms)C outputU model0.286 Vp-p (75 ohms)R, T models0.3 Vp-p (75 ohms)COMPONENT VIDEO outputY output1 Vp-p (75 ohms)Pb outputU model0.648 Vp-p (75 ohms)R, T models0.7 Vp-p (75 ohms)Pr outputU model0.648 Vp-p (75 ohms)R, T models0.7 Vp-p (75 ohms)I GENERALPower RequirementsU model120V, 60HzT model220V, 50HzR model110 to 240V, 50/60HzPower Consumption30WDimensions (W x H x D)(Without side panels)435 x 116 x 404 mm(17-1/8” x 4-9/16” x 15-7/8”)(With side panels)473 x 116 x 404 mm(18-5/8” x 4-9/16” x 15-7/8”)Weight(Without side panels)6.2 kg (13 lbs 10 oz)(With side panels)7.2 kg (15 lbs 13 oz)AccessoriesAudio/video connection cordRemote control transmitterDry-cell: x2 (Size “AA”, R06)* Specifications subject to change without notice.LOCALE MANAGEMENT INFORMATIONLocale Management Information : This DVD player is designed and manufactured to respond to the LocaleManagement Information that is recorded on a DVD disc. If the Locale number described on the DVD disc does notcorrespond to the Locale number of this DVD player, this DVD player cannot play this disc.This product incorporates copyrightprotection technology that isprotected by method claims ofcertain U.S. patents and otherintellectual property rights ownedby Macrovision Corporation andother rights owners. Use of thiscopyright protection technologymust be authorized by MacrovisionCorporation, and is intended forhome and other limited viewing usesonly unless otherwise authorizedby Macrovision Corporation.Reverse engineering or disassemblyis prohibited.qwrwttrwyetDVD-C900DVD-C900I REAR PANELSMU modelMR modelMT model4DVD-C900DVD-C9005I PRECAUTION LASER DIODEI HANDLING PRECAUTIONS FOR TRAVERS DECKDVD-C900DVD-C9006I INTERNAL VIEW4321567435 (171/8)473 (185/8)100 (315/16)16 (5/8)116 (49/16)4(3/16)6(1/4)394 (151/2)404 (157/8)G DIMENSIONUnit : mm (inch)q SWITCHING POWER SUPPLYw CM-200 UNITe CLAMPER ASSYr P.C.B. OPERATION (2)t P.C.B. OPERATION (1)y TRAY ASSYu P.C.B. MAINDVD-C900DVD-C9007I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)Fig. 21. Removal of Top Cover & Side Panelsa. Remove 8 screws ( q ) and also 3 screws ( w ) asshown in Fig. 1.2. Removal of Tray Assya. Remove 1 screw ( e ) as shown in Fig. 1.b. Turn Gear/L0 as shown in Fig. 2 counter clockwisegradually till immediately before the tray starts tomove and stop it there.CAUTION : Gear/L0, if turned counter clockwise con-tinuously, will mesh with the gear of thetray and the tray will come out. When re-moving the tray, use care so that Gear/L0will not mesh with the gear of the tray.c. Pull out the Tray Assy.IMPORTANT : Installation of Table.Install the table according to the following procedure.1) Slide the Lever so that the Gear/RT becomesfree. (Fig.B)2) With the “L” mark on the Gear/RT alignedwith the same mark on the Tray, lock it withthe Lever. (Fig.B)3) Install the Table by aligning it to the thick lineon “ / ” mark. (Fig.3)*Check that the Table is locked after installation.Fig. 1LeverTrayGear/RT1Fit the Gear/RT to “L” mark.Fig. BFit the table to the thick line on “ / ” mark.qqwTrayTrayGear/L0reTop CoverPlate/TableLockUnlockSide PanelSide Panel3. Removal of Tablea. Remove 2 screw ( r ) and then remove the RollerAssy as shown in Fig. 3.b. Remove the Plate/Table as shown in Fig. 3.c. Remove 1 screw ( t ) and then take off the Table asshown in Fig. 3.Fig. AGPrecaution for installation of the Tray Assy.On Tray Assy setting.Check the Direction of marking “L” on gearaccording to this drawing.Gear/L0Front PanelGear/L01MarkingFig. 3tDVD-C900DVD-C90084. Removal of Clamp Assya. Remove 2 screws ( y ) as shown in Fig. 4.5. Removal of CM-200 UnitBe sure to make both your body and the work tablegrounded.a. Remove 5 screws ( u ) as shown in Fig. 4.b. Remove cables (CB1, CB2) from the P.C.B. Main.CAUTIONThe flat cable CB1 is used to connect the traverseunit (laser pickup). Its terminal must not be touched.(The laser pickup is easy to be damaged.)c. Take the CM-200 Unit out slowly.6. Removal of Traverse UnitBe sure to make both your body and the work tablegrounded.a. Remove 2 screws ( i ) and then remove the PUAssy as shown Fig. 4.b. Remove 4 screws ( o ) and then remove theTraverse Unit as shown Fig. 5.After removing the traverse unit, be sure to take theproper measure to protect the laser diode against anelectrostatic breakdown.Fig. 5Fig. 4Traverse UnitoouuuCM-200 UnitiuiyCB1CB2To Prevent Damage to the Laser DiodeStatic electricity destroys the Laser Diode. Always takecountermeasures to prevent static electricity damage whenprerforming repairs around the Laser Pick-Up.1. Do not touch the area around the Laser Pick-Up or theActuator.2. Do not check the Laser Diode with a tester or other device(the Laser Diode can be broken quite easily).3. Short-circuit the Laser Pick-UpSolder the Land in the center of the flexible cable of theLaser Pick-Up. This will short-circuit the Laser Diode andhelp prevent damage from static electricity.If the flexible cable has no Land, short-circuit TP20 andTP21 (See Fig. 6). This will provide the same protection aswhen the Land is used for shorting the flexible cable.Caution:Do not forget to remove the soldered Laser Diode short-circuitafter finishing repair, and leave the circuit open.Soldered Short-CircuitTP20TP19TP22TP21Fig. 6DVD-C900DVD-C9009I REPLACING THE MAIN PARTS OF THE TRAVERSE UNIT2. Replacing the Traverse Motor Unita. After the Laser Pick-Up has been removed, remove2 screws and then remove the Travers Motor Unit.3. Replacing the Disc Motora. This disc motor can be removed after the TraverseUnit has been separated into two sections.b. Remove 2 screws A.c.Remove 2 screws B using an Hex. wrench. (2.0 mm)Note: It is not necessary to remove the Laser Pick-Upfor replacement of the Disc Motor.This section describes the replacement of the mainparts in the Traverse Unit, including the Laser Pick-Up, the Disc Motor, the Traverse Motor Unit.Work should be performed after removing the TraverseUnit.Preparation Prior to Replacing the PartsAlways perform this work after taking action to preventdamage to the Laser Diode, regardless of whether ornot the Laser Pick-Up is in working order.When replacing the laser pickup, be sure to write downthe serial number of the product and the specificsymptom.1. Remove 2 connectors and 3 flexible cables on theRelay Board. (FP0001-FP0003, P0004 and P0005)Remove 2 screws and then remove the RelayBoard.2. Remove 3 screws, so that, Traverse Unit can beseparated into two sections.1. Replacing the Laser Pick-Upa. Remove 2 screws and then remove the Laser Pick-Up.P0005P0004FP0001FP0003FP0002Fig. Relay BoardDVD-C900DVD-C900104. Disc Motor Assembly/Tentative TiltAdjustmenta. For the Disc Motor assembling, install the 2 screwsB (adjustment screw) after firmly tightening 2 screwsA. (Refer to the figure Replacement of the DiscMotor.)b. Use 2 screws B to temporarily set the Disc Motorso that it rests parallel to the Base.c. For final adjustment, proceed the Tilt Adjustment ofDisc Motor (Page 12).5. Othersa. Reassemble the Laser Pick-Up and the TraverseMotor Unit in precisely the reverse order as theywere disassembled.b. After reassemble the Laser Pick-Up and the TraverseMotor Unit, perform the Tilt Adjustment of DiscMotor (page 12).I GREASE APPLICATION DIAGRAM (Traverse Unit)Grease: Molycoat EM60L(P/No. TX946270)DVD-C900DVD-C90011I MAIN P.C.B. OPERATION CHECKWith PLAY operated in the test mode, even when the disc is played, the audio and video signals of thedisc are not output from the audio/video output terminal. In order to check the Main P.C.B. whileconfirming the sound /image of a disc, use the following procedure.a. Remove the top cover.b. Connect the power plug and then turn on the powerswitch.c. Play a disc.d. Press the PLAYXCHANGE button.(This sets the trayejected without interrupting playing.)Perform steps e through h below in the PLAYXCHANGEPLAY state. Use special care so that shorting will notoccur during the removal work.e. Remove 8 plastic rivets ( !0 ) and then remove theHolder/P.C.B. (Fig. 13)f. Remove 2 screws ( !1 ) and then remove theOperation (1) P.C.B. (Fig. 13)g. Remove 2 screws ( !2 ) and 2 screws ( !3 ) and thenremove the Main P.C.B. (Fig. 13)h. Set the Main P.C.B upright as shown in Fig. 14.CAUTIONG As the grounding becomes loose when the Main P.C.Bis removed from the chassis, it to the chassis.G Do not allow anything like cloth (insulating material) toenter and contact between the Operation (1) P.C.B. andthe Main P.C.B.i. After confirming the operation, turn off the powerswitch and proceed to assembly.!0!1!0!0!2!3Fig. 13Main P.C.B.Operation (1) P.C.B.Holder/P.C.B.Fig. 14Main P.C.B.DVD-C900DVD-C90012I ADJUSTMENTTilt Adjustment of Disc MotorAfter replacing parts in the Traverse Unit, it is necessaryto adjust the Tilt Adjustment of Disc Motor from bottomside.Please follow the following procedures for adjusting.When the following parts have been replaced, discmotor adjustment will be required.1. The disc motor.2. The laser pick-up.3. The traverse motor unit.4. The parts around the laser pick-up (rail, etc.).G Extension cable1.35-pin flat cable for servicingAAX086602.Stabilizer for servicingAAX07720NamePart No.G Adjusting BoxExtension cableAdjusting Box12055150Unit : mmCaution:1. Optical adjustment inside the laser pick-up is notpossible.2. Prior to adjusting, take countermeasures to preventdamage from static electricity.Preparation before adjustment (Installation of thetraverse unit)Be sure to make both your body and the worktable grounded.a. Connect the power plug and then turn on the powerswitch.b. When the clamp has moved up, turn off the powerswitch and disconnect the power pl